diff options
Diffstat (limited to 'lib/ssl/src/tls_connection.erl')
| -rw-r--r-- | lib/ssl/src/tls_connection.erl | 530 |
1 files changed, 318 insertions, 212 deletions
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl index ae784380c8..ebb723673e 100644 --- a/lib/ssl/src/tls_connection.erl +++ b/lib/ssl/src/tls_connection.erl @@ -17,7 +17,6 @@ %% %% %CopyrightEnd% %% - %% %%---------------------------------------------------------------------- %% Purpose: Handles an ssl connection, e.i. both the setup @@ -48,10 +47,11 @@ %% State transition handling -export([next_event/3, next_event/4, - handle_common_event/4]). + handle_protocol_record/3]). %% Handshake handling --export([renegotiation/2, renegotiate/2, send_handshake/2, +-export([renegotiation/2, renegotiate/2, send_handshake/2, + send_handshake_flight/1, queue_handshake/2, queue_change_cipher/2, reinit/1, reinit_handshake_data/1, select_sni_extension/1, empty_connection_state/2]). @@ -127,7 +127,7 @@ start_fsm(Role, Host, Port, Socket, {#ssl_options{erl_dist = true},_, Tracker} = end. %%-------------------------------------------------------------------- --spec start_link(atom(), pid(), host(), inet:port_number(), port(), list(), pid(), tuple()) -> +-spec start_link(atom(), pid(), ssl:host(), inet:port_number(), port(), list(), pid(), tuple()) -> {ok, pid()} | ignore | {error, reason()}. %% %% Description: Creates a gen_statem process which calls Module:init/1 to @@ -162,30 +162,32 @@ pids(#state{protocol_specific = #{sender := Sender}}) -> %%==================================================================== %% State transition handling %%==================================================================== -next_record(#state{unprocessed_handshake_events = N} = State) when N > 0 -> - {no_record, State#state{unprocessed_handshake_events = N-1}}; - +next_record(#state{handshake_env = + #handshake_env{unprocessed_handshake_events = N} = HsEnv} + = State) when N > 0 -> + {no_record, State#state{handshake_env = + HsEnv#handshake_env{unprocessed_handshake_events = N-1}}}; next_record(#state{protocol_buffers = - #protocol_buffers{tls_packets = [], tls_cipher_texts = [CT | Rest]} - = Buffers, - connection_states = ConnStates0, - negotiated_version = Version, - ssl_options = #ssl_options{padding_check = Check}} = State) -> - - case tls_record:decode_cipher_text(Version, CT, ConnStates0, Check) of - {Plain, ConnStates} -> - {Plain, State#state{protocol_buffers = - Buffers#protocol_buffers{tls_cipher_texts = Rest}, - connection_states = ConnStates}}; - #alert{} = Alert -> - {Alert, State} - end; -next_record(#state{protocol_buffers = #protocol_buffers{tls_packets = [], tls_cipher_texts = []}, + #protocol_buffers{tls_cipher_texts = [#ssl_tls{type = Type}| _] = CipherTexts0} + = Buffers, + connection_states = ConnectionStates0, + connection_env = #connection_env{negotiated_version = Version}, + ssl_options = #ssl_options{padding_check = Check}} = State) -> + case decode_cipher_texts(Version, Type, CipherTexts0, ConnectionStates0, Check, <<>>) of + {#ssl_tls{} = Record, ConnectionStates, CipherTexts} -> + {Record, State#state{protocol_buffers = Buffers#protocol_buffers{tls_cipher_texts = CipherTexts}, + connection_states = ConnectionStates}}; + {#alert{} = Alert, ConnectionStates, CipherTexts} -> + {Alert, State#state{protocol_buffers = Buffers#protocol_buffers{tls_cipher_texts = CipherTexts}, + connection_states = ConnectionStates}} + end; +next_record(#state{protocol_buffers = #protocol_buffers{tls_cipher_texts = []}, protocol_specific = #{active_n_toggle := true, active_n := N} = ProtocolSpec, - socket = Socket, - close_tag = CloseTag, - transport_cb = Transport} = State) -> - case tls_socket:setopts(Transport, Socket, [{active, N}]) of + static_env = #static_env{socket = Socket, + close_tag = CloseTag, + transport_cb = Transport} + } = State) -> + case tls_socket:setopts(Transport, Socket, [{active, N}]) of ok -> {no_record, State#state{protocol_specific = ProtocolSpec#{active_n_toggle => false}}}; _ -> @@ -216,14 +218,37 @@ next_event(StateName, Record, State, Actions) -> {next_state, StateName, State, [{next_event, internal, Alert} | Actions]} end. -handle_common_event(internal, #alert{} = Alert, StateName, - #state{negotiated_version = Version} = State) -> - ssl_connection:handle_own_alert(Alert, Version, StateName, State); +decode_cipher_texts(_, Type, [] = CipherTexts, ConnectionStates, _, Acc) -> + {#ssl_tls{type = Type, fragment = Acc}, ConnectionStates, CipherTexts}; +decode_cipher_texts(Version, Type, + [#ssl_tls{type = Type} = CT | CipherTexts], ConnectionStates0, Check, Acc) -> + case tls_record:decode_cipher_text(Version, CT, ConnectionStates0, Check) of + {#ssl_tls{type = ?APPLICATION_DATA, fragment = Plain}, ConnectionStates} -> + decode_cipher_texts(Version, Type, CipherTexts, + ConnectionStates, Check, <<Acc/binary, Plain/binary>>); + {#ssl_tls{type = Type0, fragment = Plain}, ConnectionStates} -> + {#ssl_tls{type = Type0, fragment = Plain}, ConnectionStates, CipherTexts}; + #alert{} = Alert -> + {Alert, ConnectionStates0, CipherTexts} + end; +decode_cipher_texts(_, Type, CipherTexts, ConnectionStates, _, Acc) -> + {#ssl_tls{type = Type, fragment = Acc}, ConnectionStates, CipherTexts}. + +%%% TLS record protocol level application data messages + +handle_protocol_record(#ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State0) -> + case ssl_connection:read_application_data(Data, State0) of + {stop, _, _} = Stop-> + Stop; + {Record, State1} -> + {next_state, StateName, State, Actions} = next_event(StateName, Record, State1), + ssl_connection:hibernate_after(StateName, State, Actions) + end; %%% TLS record protocol level handshake messages -handle_common_event(internal, #ssl_tls{type = ?HANDSHAKE, fragment = Data}, +handle_protocol_record(#ssl_tls{type = ?HANDSHAKE, fragment = Data}, StateName, #state{protocol_buffers = #protocol_buffers{tls_handshake_buffer = Buf0} = Buffers, - negotiated_version = Version, + connection_env = #connection_env{negotiated_version = Version}, ssl_options = Options} = State0) -> try EffectiveVersion = effective_version(Version, Options), @@ -241,22 +266,23 @@ handle_common_event(internal, #ssl_tls{type = ?HANDSHAKE, fragment = Data}, connection -> ssl_connection:hibernate_after(StateName, State, Events); _ -> + HsEnv = State#state.handshake_env, {next_state, StateName, - State#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events} + State#state{protocol_buffers = Buffers, + handshake_env = + HsEnv#handshake_env{unprocessed_handshake_events + = unprocessed_events(Events)}}, Events} end end catch throw:#alert{} = Alert -> ssl_connection:handle_own_alert(Alert, Version, StateName, State0) end; -%%% TLS record protocol level application data messages -handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) -> - {next_state, StateName, State, [{next_event, internal, {application_data, Data}}]}; %%% TLS record protocol level change cipher messages -handle_common_event(internal, #ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) -> +handle_protocol_record(#ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) -> {next_state, StateName, State, [{next_event, internal, #change_cipher_spec{type = Data}}]}; %%% TLS record protocol level Alert messages -handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName, - #state{negotiated_version = Version} = State) -> +handle_protocol_record(#ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName, + #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try decode_alerts(EncAlerts) of Alerts = [_|_] -> handle_alerts(Alerts, {next_state, StateName, State}); @@ -272,24 +298,26 @@ handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, Sta end; %% Ignore unknown TLS record level protocol messages -handle_common_event(internal, #ssl_tls{type = _Unknown}, StateName, State) -> - {next_state, StateName, State}. +handle_protocol_record(#ssl_tls{type = _Unknown}, StateName, State) -> + {next_state, StateName, State, []}. %%==================================================================== %% Handshake handling %%==================================================================== renegotiation(Pid, WriteState) -> gen_statem:call(Pid, {user_renegotiate, WriteState}). -renegotiate(#state{role = client} = State, Actions) -> +renegotiate(#state{static_env = #static_env{role = client}, + handshake_env = HsEnv} = State, Actions) -> %% Handle same way as if server requested %% the renegotiation Hs0 = ssl_handshake:init_handshake_history(), - {next_state, connection, State#state{tls_handshake_history = Hs0}, + {next_state, connection, State#state{handshake_env = HsEnv#handshake_env{tls_handshake_history = Hs0}}, [{next_event, internal, #hello_request{}} | Actions]}; -renegotiate(#state{role = server, - socket = Socket, - transport_cb = Transport, - negotiated_version = Version, +renegotiate(#state{static_env = #static_env{role = server, + socket = Socket, + transport_cb = Transport}, + handshake_env = HsEnv, + connection_env = #connection_env{negotiated_version = Version}, connection_states = ConnectionStates0} = State0, Actions) -> HelloRequest = ssl_handshake:hello_request(), Frag = tls_handshake:encode_handshake(HelloRequest, Version), @@ -299,65 +327,58 @@ renegotiate(#state{role = server, send(Transport, Socket, BinMsg), State = State0#state{connection_states = ConnectionStates, - tls_handshake_history = Hs0}, + handshake_env = HsEnv#handshake_env{tls_handshake_history = Hs0}}, next_event(hello, no_record, State, Actions). send_handshake(Handshake, State) -> send_handshake_flight(queue_handshake(Handshake, State)). -queue_handshake(Handshake, #state{negotiated_version = Version, - tls_handshake_history = Hist0, - flight_buffer = Flight0, - connection_states = ConnectionStates0, - ssl_options = SslOpts} = State0) -> + +queue_handshake(Handshake, #state{handshake_env = #handshake_env{tls_handshake_history = Hist0} = HsEnv, + connection_env = #connection_env{negotiated_version = Version}, + flight_buffer = Flight0, + ssl_options = SslOpts, + connection_states = ConnectionStates0} = State0) -> {BinHandshake, ConnectionStates, Hist} = encode_handshake(Handshake, Version, ConnectionStates0, Hist0), - Report = #{direction => outbound, - protocol => 'tls_record', - message => BinHandshake}, - HandshakeMsg = #{direction => outbound, - protocol => 'handshake', - message => Handshake}, - ssl_logger:debug(SslOpts#ssl_options.log_level, HandshakeMsg, #{domain => [otp,ssl,handshake]}), - ssl_logger:debug(SslOpts#ssl_options.log_level, Report, #{domain => [otp,ssl,tls_record]}), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'handshake', Handshake), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'tls_record', BinHandshake), State0#state{connection_states = ConnectionStates, - tls_handshake_history = Hist, + handshake_env = HsEnv#handshake_env{tls_handshake_history = Hist}, flight_buffer = Flight0 ++ [BinHandshake]}. -send_handshake_flight(#state{socket = Socket, - transport_cb = Transport, +send_handshake_flight(#state{static_env = #static_env{socket = Socket, + transport_cb = Transport}, flight_buffer = Flight} = State0) -> send(Transport, Socket, Flight), {State0#state{flight_buffer = []}, []}. -queue_change_cipher(Msg, #state{negotiated_version = Version, + +queue_change_cipher(Msg, #state{connection_env = #connection_env{negotiated_version = Version}, flight_buffer = Flight0, - connection_states = ConnectionStates0, - ssl_options = SslOpts} = State0) -> + ssl_options = SslOpts, + connection_states = ConnectionStates0} = State0) -> {BinChangeCipher, ConnectionStates} = encode_change_cipher(Msg, Version, ConnectionStates0), - Report = #{direction => outbound, - protocol => 'tls_record', - message => BinChangeCipher}, - ssl_logger:debug(SslOpts#ssl_options.log_level, Report, #{domain => [otp,ssl,tls_record]}), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'tls_record', BinChangeCipher), State0#state{connection_states = ConnectionStates, flight_buffer = Flight0 ++ [BinChangeCipher]}. reinit(#state{protocol_specific = #{sender := Sender}, - negotiated_version = Version, + connection_env = #connection_env{negotiated_version = Version}, connection_states = #{current_write := Write}} = State) -> tls_sender:update_connection_state(Sender, Write, Version), reinit_handshake_data(State). -reinit_handshake_data(State) -> +reinit_handshake_data(#state{handshake_env = HsEnv} =State) -> %% premaster_secret, public_key_info and tls_handshake_info %% are only needed during the handshake phase. %% To reduce memory foot print of a connection reinitialize them. State#state{ - premaster_secret = undefined, - public_key_info = undefined, - tls_handshake_history = ssl_handshake:init_handshake_history() + handshake_env = HsEnv#handshake_env{tls_handshake_history = ssl_handshake:init_handshake_history(), + public_key_info = undefined, + premaster_secret = undefined} }. select_sni_extension(#client_hello{extensions = #{sni := SNI}}) -> @@ -381,17 +402,15 @@ empty_connection_state(ConnectionEnd, BeastMitigation) -> encode_alert(#alert{} = Alert, Version, ConnectionStates) -> tls_record:encode_alert_record(Alert, Version, ConnectionStates). -send_alert(Alert, #state{negotiated_version = Version, - socket = Socket, - transport_cb = Transport, - connection_states = ConnectionStates0, - ssl_options = SslOpts} = StateData0) -> - {BinMsg, ConnectionStates} = encode_alert(Alert, Version, ConnectionStates0), +send_alert(Alert, #state{static_env = #static_env{socket = Socket, + transport_cb = Transport}, + connection_env = #connection_env{negotiated_version = Version}, + ssl_options = SslOpts, + connection_states = ConnectionStates0} = StateData0) -> + {BinMsg, ConnectionStates} = + encode_alert(Alert, Version, ConnectionStates0), send(Transport, Socket, BinMsg), - Report = #{direction => outbound, - protocol => 'tls_record', - message => BinMsg}, - ssl_logger:debug(SslOpts#ssl_options.log_level, Report, #{domain => [otp,ssl,tls_record]}), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'tls_record', BinMsg), StateData0#state{connection_states = ConnectionStates}. %% If an ALERT sent in the connection state, should cause the TLS @@ -470,17 +489,20 @@ getopts(Transport, Socket, Tag) -> %%-------------------------------------------------------------------- init({call, From}, {start, Timeout}, - #state{host = Host, port = Port, role = client, + #state{static_env = #static_env{role = client, + host = Host, + port = Port, + transport_cb = Transport, + socket = Socket, + session_cache = Cache, + session_cache_cb = CacheCb}, + handshake_env = #handshake_env{renegotiation = {Renegotiation, _}} = HsEnv, + connection_env = CEnv, ssl_options = SslOpts, session = #session{own_certificate = Cert} = Session0, - transport_cb = Transport, socket = Socket, - connection_states = ConnectionStates0, - renegotiation = {Renegotiation, _}, - session_cache = Cache, - session_cache_cb = CacheCb + connection_states = ConnectionStates0 } = State0) -> KeyShare = maybe_generate_client_shares(SslOpts), - Timer = ssl_connection:start_or_recv_cancel_timer(Timeout, From), Hello = tls_handshake:client_hello(Host, Port, ConnectionStates0, SslOpts, Cache, CacheCb, Renegotiation, Cert, KeyShare), @@ -489,23 +511,17 @@ init({call, From}, {start, Timeout}, {BinMsg, ConnectionStates, Handshake} = encode_handshake(Hello, HelloVersion, ConnectionStates0, Handshake0), send(Transport, Socket, BinMsg), - Report = #{direction => outbound, - protocol => 'tls_record', - message => BinMsg}, - HelloMsg = #{direction => outbound, - protocol => 'handshake', - message => Hello}, - ssl_logger:debug(SslOpts#ssl_options.log_level, HelloMsg, #{domain => [otp,ssl,handshake]}), - ssl_logger:debug(SslOpts#ssl_options.log_level, Report, #{domain => [otp,ssl,tls_record]}), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'handshake', Hello), + ssl_logger:debug(SslOpts#ssl_options.log_level, outbound, 'tls_record', BinMsg), + State = State0#state{connection_states = ConnectionStates, - negotiated_version = HelloVersion, %% Requested version + connection_env = CEnv#connection_env{negotiated_version = HelloVersion}, %% Requested version session = Session0#session{session_id = Hello#client_hello.session_id}, - tls_handshake_history = Handshake, + handshake_env = HsEnv#handshake_env{tls_handshake_history = Handshake}, start_or_recv_from = From, - timer = Timer, - key_share = KeyShare}, - next_event(hello, no_record, State); + key_share = KeyShare}, + next_event(hello, no_record, State, [{{timeout, handshake}, Timeout, close}]); init(Type, Event, State) -> gen_handshake(?FUNCTION_NAME, Type, Event, State). @@ -517,8 +533,9 @@ init(Type, Event, State) -> %%-------------------------------------------------------------------- error({call, From}, {start, _Timeout}, #state{protocol_specific = #{error := Error}} = State) -> - ssl_connection:stop_and_reply( - normal, {reply, From, {error, Error}}, State); + {stop_and_reply, {shutdown, normal}, + [{reply, From, {error, Error}}], State}; + error({call, _} = Call, Msg, State) -> gen_handshake(?FUNCTION_NAME, Call, Msg, State); error(_, _, _) -> @@ -532,25 +549,32 @@ error(_, _, _) -> %%-------------------------------------------------------------------- hello(internal, #client_hello{extensions = Extensions} = Hello, #state{ssl_options = #ssl_options{handshake = hello}, + handshake_env = HsEnv, start_or_recv_from = From} = State) -> {next_state, user_hello, State#state{start_or_recv_from = undefined, - hello = Hello}, + handshake_env = HsEnv#handshake_env{hello = Hello}}, [{reply, From, {ok, Extensions}}]}; hello(internal, #server_hello{extensions = Extensions} = Hello, #state{ssl_options = #ssl_options{handshake = hello}, + handshake_env = HsEnv, start_or_recv_from = From} = State) -> {next_state, user_hello, State#state{start_or_recv_from = undefined, - hello = Hello}, + handshake_env = HsEnv#handshake_env{hello = Hello}}, [{reply, From, {ok, Extensions}}]}; + hello(internal, #client_hello{client_version = ClientVersion} = Hello, #state{connection_states = ConnectionStates0, - port = Port, session = #session{own_certificate = Cert} = Session0, - renegotiation = {Renegotiation, _}, - session_cache = Cache, - session_cache_cb = CacheCb, - negotiated_protocol = CurrentProtocol, - key_algorithm = KeyExAlg, + static_env = #static_env{ + port = Port, + session_cache = Cache, + session_cache_cb = CacheCb}, + handshake_env = #handshake_env{kex_algorithm = KeyExAlg, + renegotiation = {Renegotiation, _}, + negotiated_protocol = CurrentProtocol} = HsEnv, + connection_env = CEnv, + session = #session{own_certificate = Cert} = Session0, ssl_options = SslOpts} = State) -> + case choose_tls_version(SslOpts, Hello) of 'tls_v1.3' -> %% Continue in TLS 1.3 'start' state @@ -563,8 +587,8 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello, Renegotiation) of #alert{} = Alert -> ssl_connection:handle_own_alert(Alert, ClientVersion, hello, - State#state{negotiated_version - = ClientVersion}); + State#state{connection_env = CEnv#connection_env{negotiated_version + = ClientVersion}}); {Version, {Type, Session}, ConnectionStates, Protocol0, ServerHelloExt, HashSign} -> Protocol = case Protocol0 of @@ -575,23 +599,26 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello, internal, {common_client_hello, Type, ServerHelloExt}, State#state{connection_states = ConnectionStates, - negotiated_version = Version, - hashsign_algorithm = HashSign, - client_hello_version = ClientVersion, - session = Session, - negotiated_protocol = Protocol}) + connection_env = CEnv#connection_env{negotiated_version = Version}, + handshake_env = HsEnv#handshake_env{ + hashsign_algorithm = HashSign, + client_hello_version = ClientVersion, + negotiated_protocol = Protocol}, + session = Session + }) end + end; hello(internal, #server_hello{} = Hello, #state{connection_states = ConnectionStates0, - negotiated_version = ReqVersion, - role = client, - renegotiation = {Renegotiation, _}, + connection_env = #connection_env{negotiated_version = ReqVersion} = CEnv, + static_env = #static_env{role = client}, + handshake_env = #handshake_env{renegotiation = {Renegotiation, _}}, ssl_options = SslOptions} = State) -> case tls_handshake:hello(Hello, SslOptions, ConnectionStates0, Renegotiation) of - #alert{} = Alert -> + #alert{} = Alert -> %%TODO ssl_connection:handle_own_alert(Alert, ReqVersion, hello, - State#state{negotiated_version = ReqVersion}); + State#state{connection_env = CEnv#connection_env{negotiated_version = ReqVersion}}); {Version, NewId, ConnectionStates, ProtoExt, Protocol} -> ssl_connection:handle_session(Hello, Version, NewId, ConnectionStates, ProtoExt, Protocol, State) @@ -642,22 +669,77 @@ connection({call, From}, {user_renegotiate, WriteState}, #state{connection_states = ConnectionStates} = State) -> {next_state, ?FUNCTION_NAME, State#state{connection_states = ConnectionStates#{current_write => WriteState}}, [{next_event,{call, From}, renegotiate}]}; +connection({call, From}, + {close, {Pid, _Timeout}}, + #state{connection_env = #connection_env{terminated = closed} =CEnv} = State) -> + {next_state, downgrade, State#state{connection_env = + CEnv#connection_env{terminated = true, + downgrade = {Pid, From}}}, + [{next_event, internal, ?ALERT_REC(?WARNING, ?CLOSE_NOTIFY)}]}; +connection({call, From}, + {close,{Pid, Timeout}}, + #state{connection_states = ConnectionStates, + protocol_specific = #{sender := Sender}, + connection_env = CEnv + } = State0) -> + case tls_sender:downgrade(Sender, Timeout) of + {ok, Write} -> + %% User downgrades connection + %% When downgrading an TLS connection to a transport connection + %% we must recive the close alert from the peer before releasing the + %% transport socket. + State = send_alert(?ALERT_REC(?WARNING, ?CLOSE_NOTIFY), + State0#state{connection_states = + ConnectionStates#{current_write => Write}}), + {next_state, downgrade, State#state{connection_env = + CEnv#connection_env{downgrade = {Pid, From}, + terminated = true}}, + [{timeout, Timeout, downgrade}]}; + {error, timeout} -> + {stop_and_reply, {shutdown, downgrade_fail}, [{reply, From, {error, timeout}}]} + end; +connection(internal, #hello_request{}, + #state{static_env = #static_env{role = client, + host = Host, + port = Port, + session_cache = Cache, + session_cache_cb = CacheCb}, + handshake_env = #handshake_env{renegotiation = {Renegotiation, peer}}, + session = #session{own_certificate = Cert} = Session0, + ssl_options = SslOpts, + protocol_specific = #{sender := Pid}, + connection_states = ConnectionStates} = State0) -> + try tls_sender:peer_renegotiate(Pid) of + {ok, Write} -> + Hello = tls_handshake:client_hello(Host, Port, ConnectionStates, SslOpts, + Cache, CacheCb, Renegotiation, Cert, undefined), + {State, Actions} = send_handshake(Hello, State0#state{connection_states = ConnectionStates#{current_write => Write}}), + next_event(hello, no_record, State#state{session = Session0#session{session_id + = Hello#client_hello.session_id}}, Actions) + catch + _:_ -> + {stop, {shutdown, sender_blocked}, State0} + end; connection(internal, #hello_request{}, - #state{role = client, - renegotiation = {Renegotiation, _}, - host = Host, port = Port, + #state{static_env = #static_env{role = client, + host = Host, + port = Port, + session_cache = Cache, + session_cache_cb = CacheCb}, + handshake_env = #handshake_env{renegotiation = {Renegotiation, _}}, session = #session{own_certificate = Cert} = Session0, - session_cache = Cache, session_cache_cb = CacheCb, - ssl_options = SslOpts, + ssl_options = SslOpts, connection_states = ConnectionStates} = State0) -> Hello = tls_handshake:client_hello(Host, Port, ConnectionStates, SslOpts, Cache, CacheCb, Renegotiation, Cert, undefined), + {State, Actions} = send_handshake(Hello, State0), next_event(hello, no_record, State#state{session = Session0#session{session_id = Hello#client_hello.session_id}}, Actions); connection(internal, #client_hello{} = Hello, - #state{role = server, allow_renegotiate = true, connection_states = CS, - %%protocol_cb = Connection, + #state{static_env = #static_env{role = server}, + handshake_env = #handshake_env{allow_renegotiate = true}= HsEnv, + connection_states = CS, protocol_specific = #{sender := Sender} } = State) -> %% Mitigate Computational DoS attack @@ -668,17 +750,19 @@ connection(internal, #client_hello{} = Hello, erlang:send_after(?WAIT_TO_ALLOW_RENEGOTIATION, self(), allow_renegotiate), {ok, Write} = tls_sender:renegotiate(Sender), next_event(hello, no_record, State#state{connection_states = CS#{current_write => Write}, - allow_renegotiate = false, - renegotiation = {true, peer} + handshake_env = HsEnv#handshake_env{renegotiation = {true, peer}, + allow_renegotiate = false} }, [{next_event, internal, Hello}]); connection(internal, #client_hello{}, - #state{role = server, allow_renegotiate = false, - protocol_cb = Connection} = State0) -> + #state{static_env = #static_env{role = server, + protocol_cb = Connection}, + handshake_env = #handshake_env{allow_renegotiate = false}} = State0) -> Alert = ?ALERT_REC(?WARNING, ?NO_RENEGOTIATION), send_alert_in_connection(Alert, State0), State = Connection:reinit_handshake_data(State0), next_event(?FUNCTION_NAME, no_record, State); + connection(Type, Event, State) -> ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE). @@ -686,6 +770,23 @@ connection(Type, Event, State) -> -spec downgrade(gen_statem:event_type(), term(), #state{}) -> gen_statem:state_function_result(). %%-------------------------------------------------------------------- +downgrade(internal, #alert{description = ?CLOSE_NOTIFY}, + #state{static_env = #static_env{transport_cb = Transport, + socket = Socket}, + connection_env = #connection_env{downgrade = {Pid, From}}} = State) -> + tls_socket:setopts(Transport, Socket, [{active, false}, {packet, 0}, {mode, binary}]), + Transport:controlling_process(Socket, Pid), + {stop_and_reply, {shutdown, downgrade},[{reply, From, {ok, Socket}}], State}; +downgrade(timeout, downgrade, #state{ connection_env = #connection_env{downgrade = {_, From}}} = State) -> + {stop_and_reply, {shutdown, normal},[{reply, From, {error, timeout}}], State}; +downgrade(info, {CloseTag, Socket}, + #state{static_env = #static_env{socket = Socket, + close_tag = CloseTag}, + connection_env = #connection_env{downgrade = {_, From}}} = + State) -> + {stop_and_reply, {shutdown, normal},[{reply, From, {error, CloseTag}}], State}; +downgrade(info, Info, State) -> + handle_info(Info, ?FUNCTION_NAME, State); downgrade(Type, Event, State) -> ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE). @@ -806,10 +907,10 @@ wait_sh(Type, Event, State) -> callback_mode() -> state_functions. - -terminate( - {shutdown, sender_died, Reason}, _StateName, - #state{socket = Socket, transport_cb = Transport} = State) -> +terminate({shutdown, sender_died, Reason}, _StateName, + #state{static_env = #static_env{socket = Socket, + transport_cb = Transport}} + = State) -> ssl_connection:handle_trusted_certs_db(State), close(Reason, Socket, Transport, undefined, undefined); terminate(Reason, StateName, State) -> @@ -830,65 +931,63 @@ initial_state(Role, Sender, Host, Port, Socket, {SSLOptions, SocketOptions, Trac #ssl_options{beast_mitigation = BeastMitigation, erl_dist = IsErlDist} = SSLOptions, ConnectionStates = tls_record:init_connection_states(Role, BeastMitigation), - ErlDistData = erl_dist_data(IsErlDist), SessionCacheCb = case application:get_env(ssl, session_cb) of {ok, Cb} when is_atom(Cb) -> Cb; _ -> ssl_session_cache end, - InternalActiveN = case application:get_env(ssl, internal_active_n) of {ok, N} when is_integer(N) andalso (not IsErlDist) -> N; _ -> ?INTERNAL_ACTIVE_N end, - UserMonitor = erlang:monitor(process, User), - - #state{socket_options = SocketOptions, - ssl_options = SSLOptions, - session = #session{is_resumable = new}, - transport_cb = CbModule, - data_tag = DataTag, - close_tag = CloseTag, - error_tag = ErrorTag, - role = Role, - host = Host, - port = Port, - socket = Socket, - erl_dist_data = ErlDistData, - connection_states = ConnectionStates, - protocol_buffers = #protocol_buffers{}, - user_application = {UserMonitor, User}, - user_data_buffer = <<>>, - session_cache_cb = SessionCacheCb, - renegotiation = {false, first}, - allow_renegotiate = SSLOptions#ssl_options.client_renegotiation, - start_or_recv_from = undefined, - protocol_cb = ?MODULE, - tracker = Tracker, - flight_buffer = [], - protocol_specific = #{sender => Sender, - active_n => InternalActiveN, - active_n_toggle => true - } - }. - -erl_dist_data(true) -> - #{dist_handle => undefined, - dist_buffer => <<>>}; -erl_dist_data(false) -> - #{}. - -initialize_tls_sender(#state{role = Role, - socket = Socket, - socket_options = SockOpts, - tracker = Tracker, - protocol_cb = Connection, - transport_cb = Transport, - negotiated_version = Version, + InitStatEnv = #static_env{ + role = Role, + transport_cb = CbModule, + protocol_cb = ?MODULE, + data_tag = DataTag, + close_tag = CloseTag, + error_tag = ErrorTag, + host = Host, + port = Port, + socket = Socket, + session_cache_cb = SessionCacheCb, + tracker = Tracker + }, + #state{ + static_env = InitStatEnv, + handshake_env = #handshake_env{ + tls_handshake_history = ssl_handshake:init_handshake_history(), + renegotiation = {false, first}, + allow_renegotiate = SSLOptions#ssl_options.client_renegotiation + }, + connection_env = #connection_env{user_application = {UserMonitor, User}}, + socket_options = SocketOptions, + ssl_options = SSLOptions, + session = #session{is_resumable = new}, + connection_states = ConnectionStates, + protocol_buffers = #protocol_buffers{}, + user_data_buffer = <<>>, + start_or_recv_from = undefined, + flight_buffer = [], + protocol_specific = #{sender => Sender, + active_n => InternalActiveN, + active_n_toggle => true + } + }. + +initialize_tls_sender(#state{static_env = #static_env{ + role = Role, + transport_cb = Transport, + protocol_cb = Connection, + socket = Socket, + tracker = Tracker + }, + connection_env = #connection_env{negotiated_version = Version}, + socket_options = SockOpts, ssl_options = #ssl_options{renegotiate_at = RenegotiateAt, log_level = LogLevel}, connection_states = #{current_write := ConnectionWriteState}, @@ -921,18 +1020,14 @@ next_tls_record(Data, StateName, #state{protocol_buffers = handle_record_alert(Alert, State0) end. - %% TLS 1.3 Client/Server %% - Ignore TLSPlaintext.legacy_record_version %% - Verify that TLSCiphertext.legacy_record_version is set to 0x0303 for all records %% other than an initial ClientHello, where it MAY also be 0x0301. +acceptable_record_versions(StateName, #state{connection_env = #connection_env{negotiated_version = Version}}) when StateName =/= hello-> + Version; acceptable_record_versions(hello, _) -> - [tls_record:protocol_version(Vsn) || Vsn <- ?ALL_TLS_RECORD_VERSIONS]; -acceptable_record_versions(_, #state{negotiated_version = {Major, Minor}}) - when Major > 3; Major =:= 3, Minor >= 4 -> - [{3, 3}]; -acceptable_record_versions(_, #state{negotiated_version = Version}) -> - [Version]. + [tls_record:protocol_version(Vsn) || Vsn <- ?ALL_AVAILABLE_VERSIONS]. handle_record_alert(Alert, _) -> Alert. @@ -944,26 +1039,27 @@ tls_handshake_events(Packets) -> %% raw data from socket, upack records handle_info({Protocol, _, Data}, StateName, - #state{data_tag = Protocol - } = State0) -> + #state{static_env = #static_env{data_tag = Protocol}} = State0) -> case next_tls_record(Data, StateName, State0) of {Record, State} -> next_event(StateName, Record, State); #alert{} = Alert -> ssl_connection:handle_normal_shutdown(Alert, StateName, State0), - ssl_connection:stop({shutdown, own_alert}, State0) + {stop, {shutdown, own_alert}, State0} end; -handle_info({tcp_passive, Socket}, StateName, #state{socket = Socket, - protocol_specific = PS - } = State) -> - next_event(StateName, no_record, State#state{protocol_specific = PS#{active_n_toggle => true}}); +handle_info({tcp_passive, Socket}, StateName, + #state{static_env = #static_env{socket = Socket}, + protocol_specific = PS + } = State) -> + next_event(StateName, no_record, + State#state{protocol_specific = PS#{active_n_toggle => true}}); handle_info({CloseTag, Socket}, StateName, - #state{socket = Socket, close_tag = CloseTag, + #state{static_env = #static_env{socket = Socket, close_tag = CloseTag}, + connection_env = #connection_env{negotiated_version = Version}, socket_options = #socket_options{active = Active}, protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs}, user_data_buffer = Buffer, - protocol_specific = PS, - negotiated_version = Version} = State) -> + protocol_specific = PS} = State) -> %% Note that as of TLS 1.1, %% failure to properly close a connection no longer requires that a @@ -984,7 +1080,7 @@ handle_info({CloseTag, Socket}, StateName, end, ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State), - ssl_connection:stop({shutdown, transport_closed}, State); + {stop, {shutdown, transport_closed}, State}; true -> %% Fixes non-delivery of final TLS record in {active, once}. %% Basically allows the application the opportunity to set {active, once} again @@ -1002,6 +1098,14 @@ handle_alerts([], Result) -> Result; handle_alerts(_, {stop, _, _} = Stop) -> Stop; +handle_alerts([#alert{level = ?WARNING, description = ?CLOSE_NOTIFY} | _Alerts], + {next_state, connection = StateName, #state{connection_env = CEnv, + socket_options = #socket_options{active = false}, + user_data_buffer = Buffer, + protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs}} = + State}) when (Buffer =/= <<>>) orelse + (CTs =/= []) -> + {next_state, StateName, State#state{connection_env = CEnv#connection_env{terminated = true}}}; handle_alerts([Alert | Alerts], {next_state, StateName, State}) -> handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State)); handle_alerts([Alert | Alerts], {next_state, StateName, State, _Actions}) -> @@ -1021,7 +1125,7 @@ decode_alerts(Bin) -> ssl_alert:decode(Bin). gen_handshake(StateName, Type, Event, - #state{negotiated_version = Version} = State) -> + #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try ssl_connection:StateName(Type, Event, State, ?MODULE) of Result -> Result @@ -1032,8 +1136,9 @@ gen_handshake(StateName, Type, Event, Version, StateName, State) end. + gen_handshake_1_3(StateName, Type, Event, - #state{negotiated_version = Version} = State) -> + #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try tls_connection_1_3:StateName(Type, Event, State, ?MODULE) of Result -> Result @@ -1044,7 +1149,8 @@ gen_handshake_1_3(StateName, Type, Event, Version, StateName, State) end. -gen_info(Event, connection = StateName, #state{negotiated_version = Version} = State) -> + +gen_info(Event, connection = StateName, #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try handle_info(Event, StateName, State) of Result -> Result @@ -1055,7 +1161,7 @@ gen_info(Event, connection = StateName, #state{negotiated_version = Version} = Version, StateName, State) end; -gen_info(Event, StateName, #state{negotiated_version = Version} = State) -> +gen_info(Event, StateName, #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try handle_info(Event, StateName, State) of Result -> Result @@ -1066,7 +1172,7 @@ gen_info(Event, StateName, #state{negotiated_version = Version} = State) -> Version, StateName, State) end. -gen_info_1_3(Event, connected = StateName, #state{negotiated_version = Version} = State) -> +gen_info_1_3(Event, connected = StateName, #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try handle_info(Event, StateName, State) of Result -> Result @@ -1077,7 +1183,7 @@ gen_info_1_3(Event, connected = StateName, #state{negotiated_version = Version} Version, StateName, State) end; -gen_info_1_3(Event, StateName, #state{negotiated_version = Version} = State) -> +gen_info_1_3(Event, StateName, #state{connection_env = #connection_env{negotiated_version = Version}} = State) -> try handle_info(Event, StateName, State) of Result -> Result |